Stenciling attachment for platen presses



July 10, 1934. H, w. PARMELE 1,966,417

STENCILING' ATTACHMENT FOR PLATEN PRESSES Filed May 51, 1932 aSheets-Sheet 1 July 10, 1934. H. w. PARMELE 1,966,417

STENCILING ATTACHMENT FOR PLATEN PRESSES Filed May 31, 1932 3Sheets-Sheet 2 I fiV/Z/W Ema rd fl f arzzzele 6,- My. Q2 4 July 10,1934. H. w. PARMELE 1,956,417

STENCILING ATTACHMENT FOR PLATEN PRESSES Filed May 31, 1952. 3Sheets-Sheet 3 jffwaard W Z GIWZ eZe Patented July 10, 1934 ;UN-I T-E. DSTATES PATENT o-FFicETT STENCILING'ATTACHMENT FOR PLATEN H Y A v.DRESSES I: iloward'wr Parmel e, Chi cago, lll.', assignor to, V Na z-Dar1 Company, Chicago; 111., a corporation oflllin'ois 1 7 A plicationMay'31, 1932;.lser-iaiNo..;614,487 10 mm; (ci io i i) This inventionrelates t'o theart of steneiling "Fig. 3 is'a;ti'ansverse verticalsection through designs in one or more colors on sheet material, the bedof the press taken on line 33 of Flg ;2', suchas'cardboard, or thelike,and the objectis the view also showing the position assumed by toprovide mechanism'which may bere'adily ap the 'platenwhen the press isin open position;

plied tothe ordinary platenpress to" render the Fig. 4 is a view'similar to'Fig."-3, showing the 6 latt adaptable rv pai t g Work; 3position of the parts in' the closed position of In stenciling designson sheet" material it is the-press; and I v the usual practice towipeabatch of paint'over a Figs-5 is a section through the bed taken on:stencil or screen, portions of which have been line 5 5 Of Fpreliminarily treated to render them penetrable. The generalconstruction of a platen press of The paint is moved over the stencil bymeans of a the Gordon type s W l d r d in e t, squeegee which is held inpressure-contact with nd'th r f re th press p p will only be 01 thestencil during the wiping stroke. Until comscribed insufficientdetail'to enable an under paratively recently work of this class wasdone standing of the manner in which'the novel -sten- 'by' machineswhich depended largely upon hand eiling atta ppl d theretooperation.Recently there have been-developed Referring to 1, the p e frame isindimachines which do the work, for the most part, cated gene a ly y thenumeral send the p automatically. However, the automatic machines WhichiS Pivotaliy ppq e the upper-front are necessarily of :costlyconstruction, because of p i O t frame is indicated t A d the. largeamount of mechanism required for table 0 Supported en the frame 3 e e-75 effecting vautomaticoperation of the printing 3 in hem of the p The-wh hi frame, thesqueegeaand the? sheet feed mecha (heated r yy thenumeral 11, is pi y nism.. i i connected'at 12 to the base portion ofthe-frame I have. found that the-ordinary platen press, about which it Ee d' from gp which is in common use in practically all jobtion' againstthe Platemv n inking roller frame printing establishments-may be readilyadapted 13 is Pivotally Supported O the bed y a Shaft for use inepaintprocess work. "In the regular 14,-'said ameb s'p ov i c da c w th;operation-of a platen press, such as the Gordon the usual Const uetienWi h -Supp t g press, -the printing is what may be termed a conerm'sil5w in the'regliiar eperatien Of tact printing, that is, the press remainsin closed p ess-p ry the inking ,rOllerS p y Over the position only foran instant, since all portions of bed of typ n Onto an linking table Thethe bed of type strike the sheet simultaneously bed swung t0 and fromClosed DOSitiOHhY In'order to adapt sucha press to the stenciling r ds1'7, which are d p d v0n e of designs-by the use of a squeegee anda'stenc'il ODDOS' t SideS'Of the D Reds are e 5 screen it is-necessaryto provide means whereby trieaily et d t One end W t S a t the press maybe maintained'in closed position through stub'shafts 18, which projectfrom the a sufficient length of time to allow the squeegee opposite endsof said shaft 14, the other ends of tobe moved over the stencil. Also itis necessaid connecting rods 17 being connected to crank sary to changesomewhat the motion of theinking discs 19 by means of pins 21,whichar'eeccentriroller frameof-the press .inorder to make it' callymounted on discs-19. Pins 21 have yield 95 adaptable for operation ofthe squeegee; c ing connectionwith rods 17, the ends-of said rods Themeansprovided inaccordance'with my in-' bein'g'provided with rectangularopenings 22 in vention for modifying the-standard-formofplaten' whichare slidably -mounted bearing blocks; 23; press intheaforementioned.mannerwill befully the latter" being journaled on pins21- and being understood from thefollowing detailed descrip-I engaged attheir opposite ends by coil springs 24' 1 tion, which, taken inconnection with the accomand-25, which are housed in cavities formed infpanying drawingadiscloses aspreferred embodirods 'I-7,'said springsbeingarranged to bear at ment thereof. Y 1 e their freeends "against the endsof blocks 23.

Referring to thedrawingsz-r The reason for providing a yieldingconnection 5 Fig. 1 is a side elevational View of a platen press betweenrods'l'l' and crank discs 19 will be here- 1 5 of the Gordon type, towhich the novelstenciling' inafter explained. Crank discs 19 are mountedattachment hasbeen applied; a on .a shaft 26,-the latter being driven inthe usual Fig. '2 is afront elevationalview of thestencil manner from amain drive shaft 27 which is pro: supporting frame and paint feedmechanism, the vide'd with a spur gear.23; having driving engage-''viewbeing taken on line 22 of Fi 1; ment with .a spurlwheel29 carriedonshaft 26. 11'!) A fiy-wheel 31 is mounted on one end of the main driveshaft 27 to provide for smooth and uniform movement of the bed andplaten.

The platen 9 is rocked about its supporting shaft 32 (Fig. 3) in timedrelation with the movements of bed 11. However, the mechanism forrocking the platen is not shown, since it is well known in the art. Theusual frisket frame 33 is pivotally connected at 34 to the platen. Thisframe is provided with a pair of gripper arms-35 for engaging theopposite edges of the sheet, and is also provided at its lower edge witha cam roller 37 which is journaled on a pin 36 carried by said frame 33.A cam piece 33, rigidly supported on the main press frame 8, engagesroller 37 to control the movement of the frisket frame to and fromclosed position against the platen in timed relation with the openingand closing movements of the press.

The usual emergency adjustment is provided for preventing contact of thebed with the platen. This mechanism, which is shown in Figs. 1 and 2',comprises: a link 39 which is pivotally connected at 41 to an arm 42,the latter being rigid on stub shaft 18; a hand operated lever 43fulcrumed at 44 to the frame; and a series of intermediate connectinglinks 45, 46, 47, 48 and 49 interposed between lever 43 and the lowerend of link 39. It will be apparent from Fig. 1 that when lever 43 ismoved to the right, link 39 will be raised, thereby turning shaft 14,together with the stub shaft 18, which is mounted eccentrically thereon,in a counterclocwise direction. The effect ofthis adjustment is toincrease the efiective length of connecting rods 17, thereby preventingcomplete closing of the press. By moving lever 43 back to the positionshown in Fig. 1, the parts are returned to their normal position forallowing contact of the bed with the platen.

In order to adapt a platen press of the type which has just beendescribed to the stenciling of designs, it is necessary to substitute astencil, or screen, for the customary bed of type. This change isaccomplished in accordance with my invention, by substituting for theusual form of chase, which is used in platen processes, a special chasewhich is designed to serve as a support for a stencil-supporting frame.The construction of this special form of chase, and the asso-. ciatedstencil-supporting frame, is shown in Figs. 3 and 5. In these figuresthe chase is indicated generally by the numeral 51 and consists of a boxshaped frame, the bed of which is indicated at 52, the sides of saidframe being indi cated at 53. The chase is adapted to be demountablysecured to bed 11 in the usual manner by means of chase hooks 54 and 55.

A screen or stencil 56 is supported on chase 51 in a rectangular frame57, the latter consisting of metal strips 58, which are suitablyconnected together to form a rigid frame unit. The edges of the stencil55 are secured to strips of wood 59, the. latter being in turn securedto the metal frame pieces 58. The complete stencil frame unit,consisting of the metal rim pieces 58, the wooden rim portion 59, andthe stencil 56, is hingedly secured to the chase frame by a pair ofhinges 61, whichinterconnect the loweredge of the stencil frame to theadjacent rim portion 53 of the chase. The stencil frame is normally heldin the position shown in Fig. 3, in which position the upper edge of theframe rests against a pair of stop bars 62, which are carried on thesides 53 of the chase. A pair of leaf springs 63, interposed between thechase and the upper edge of stencil frame 57, urges the latter outwardlyagainst stop bars 62. When pressure is applied to frame 57 upon closingof the press, springs 63 yield sufiiciently to allow stencil frame 57 topivot inwardly on the chase from the position shown in Fig. 3 to theposition shown in Fig. 4..

Continuing the reference to Figs. 3 and 5, a wiping element, orsqueegee, is mounted in chase 51 for reciprocation over stencil 56. Inthe embodiment shown, the squeegee consists of a rubber wiping element64 which is movably secured by means of a clampbar 65 to a cross bar orcarriage 66, the latter being provided at its opposite ends withvertically disposed arms 67, having rollers. 68 mounted thereon forengaging in guide channels or grooves 69, which are formed in the rimportions 53 of the chase frame. The squeegee carriage 66 is arranged tobe reciprocated in the chase by the inking roller frame 13, which in theordinary operation of the press is used to operate the inking rollers inwell known manner. To this end, the arms 67 of the carriage 66 areprovided with latterly projecting rods 71, which extend through slots 72formed in the sides of the chase 51, the free ends of said rods 71 beingarranged to connect with hooks 73 which are'carried by the ends ofinking roller supporting arms 15. The upper pair of roller supportingarms 15 which are used in the operation of the press when work? ing withtype, are not needed in the operation of the press for paint processwork, and therefore simply may be left detached or if desired may beentirely removedfrom the inking roller frame.

In Fig. 3, the squeegee is shownpositioned at the lower edge of thestencil, which is the position it occupies when the. press is open. InFig. 4, the parts are shown in the position occupied when the press isclosed, and after the squeegee has traversed the stencil, it being notedthat in this position the platen 9 has been moved against stencil frame.57 to; force the latter inwardly to bring the stencil 56 into pressurecontact with wiping element 64, this inward movement of the stencilframe being permitted by the yielding of springs 63. In the closedposition of the press, a card or sheet. 74, supported on platen 9, isheld in contact with the outer face of stencil 56.

It will be apparent that some interval of time will be required for thesqueegee to traverse or advance over the stencil 56, and it is thereforenecessary to arrange the press so that it will remain in closedposition, with the stencil 56 in contact with the sheet 74, for a lengthof time suflicient to permit movement of the squeegee over the stencil.As previously pointed out, the ordinary platen press remains closed onlyfor an instant, since the bed of type contacts with all parts of thesheet simultaneously. To momentarily arrest the movement of bed 11 awayfrom the platen, I substitute for the'usual fixed connection betweenrods 17 and crank disks 19, the yielding connection between these partshereinbefore described and shown in Fig. 1. Assuming the bed 11 to be inthe open position shown in Fig. 1, it will be apparent that when crankdisks 19 are turned from the position shown, through an arc of 186degrees, bed 11 will be movedto the closed position shown in Fig. 4.However, as crank disks 19 continue to rotate from this intermediateclosed position, they will not immediate- 1y cause movement of bed 11away from the platen due to the fact that springs 25 will yield underthe pressure from blocks 23 upon reversal in the direction of thelatter. Therefore, the rods 17 will not be moved in direction to effectopening of the press untilblocks 23 have moved against the ends of theopenings22. This yielding or lost motion connection between rods 1'7 andthe crank disks 19 thus serves to maintain the press in closed positionfor an interval of time suflicient to permit the squeegee to advanceover the stencil.

In order to operate the squeegee from the custom'ary form of inkingroller frame provided for platen presses, it is necessary to slightlymodify using the pressfor stenciling work inasmuch as it is necessary tohold the squeegee at the lower edge of the stencil until the bed'ismoved to closed position, and thereafter to quickly advance it over thestencil during the briefinterval'during which the press remains closed.To this end,'I substitute for the usual rigid bar connection betweenrackets '75 and 76, a hinged bar connection consisting of an arm 7'7,connected at one end-to bracket '75, and a second arm 78,:c0nnected atone end to bracket 76, said arms '77 and '78 being pivotallyinterconnected with one another at 79'. Arm '78 is provided at its freeend with a lateral projection 81, which carries an adjusting bolt 82 thelower end of which bears against arm '77; A stop or limiting connectionis thus provided between arms '77 and 78. The squeegee carriagefifi isheld at the lower edge of the stencil, as shown in Fig. 3, by a pair oflatch arms 83, which are pivoted at 84 to the side members 53 of thechase frame, the lower ends of said-latcharms engaging over arms 6'7 toobstruct upward movement of carriage 66. Arms 83 are normally held inthis latching position by springs 85, which are positioned in wellsformed in side "portions 53 of the chase frame, said springs beingarranged to bear against the lower portions of said arms to urge thelatter in a clockwise direction, view in Fig. 3.

When the press is in the open position shown'in Fig. 1, the squeegeecarriage 66 is in the lowered position. As the press closes, arms 7'7and '78 collapse or fold together due to the fact that the' squeegeecarriage is held against upward movement by arms 83. By the time thebed11 has moved to closed position againstthe platen, arms '77 and '78 arein their extreme folded position with inking roller frame 13 stilloccupying the same position relative to thebedas that shown in Fig. 1.However, as soon as the bed 11 arrives at the completely closedposition, latch arms 83 are released from'arms 67,:this being effectedby engagement of gripper bars 35 "with lateral projections 86 formed onthe upper ends of'arms s .83. Said projections 86 aresoidesigned'that'when engaged by bars 35 they will release arms 83 atthe exact instant that the sheet '74 onfthe platen comes fully intocontact with stencil 56.] The squeegee carriage 66 being thus released,is very quickly moved upwardly across the' s'tencil'by the turning ofinking roller name, 131 about shaft 14.

This upward movement of the. squeegee is a corn paratively high speedmotion due to the fact that inking roller frame 13 is considerablyoveibalanced on shaft 14 and, when released, will'pivot under its ownweight in a counterclockwise direction, view in Fig. 1. If in aparticular machine, the frame 13 is not sufficientlyoverbal anced, aspring or weights may be attached to the free end thereof to give thenecessary quick upward movement of the squeegee. The squeegee is thusmovedacross stencil 56 while the-latter is in contact with sheet 74 andforces paint through the penetrable areas of the stencil onto the sheet.During this upward stroke of the squeegee the stencil frame 5'7 is heldin the position shown in Fig. 4 by reason of the pressure appliedthereto by the platen 9 which collapses spring 63. The upward movementof the squeegee is arrestedfas the end of the active stroke isapproached by the pair of leaf springs 88 (Fig.

3) which are positioned. in the sides 53 of the chase frame, and whichengage against rollers 68 to check the upward movement of the latter.The squeegee is moved from the upper edge of the stencil downwardly tothe lower edge thereof during the interval of opening of the press, thisbeing accomplished by movement of inking rollerframe 13 from raised tolowered position,

which movement carries the squeegee carriage 66 downwardly to the loweredge of the chase frame. In this position latch arms 83 engage over arms67 to hold the squeegee in the lowered position-shown in Fig. 3. Thelower limiting position to which'the squeegeecarriage 66 is thus movedmay be regulated by adjusting screw 82 which interconnects arms '77and78. As soon as the bed 11 moves away from the platen 9, the stencilsupporting frame 5'7 is pushed outwardly on the chase by springs63.thereby avoiding contact of wiping element 64 with the stencil whilethe squeegee is being returned to the lower edge of the stencil. Byhingedly mounting the stencil frame in this manner, so as to always makethe squeegee active upon the upstroke and inactive upon the downstroke Iam able to prevent troublesome accumulations of paint in the stencilframe.

I have found that paint can' be continuously supplied in drops or in athin stream, from a container 89 which is supported on chase 51 by abracket 91. An outlet opening in the lower edge of container 89 ispositioned so that paint will drop therefrom directly onto wipingelement 64,

from which point it flows against stencil 56. A

manually controlled valve 92 is provided for regulating the rate atwhich paint flows from the container onto the wiping element 64. Theprintedsheet is pulled from the stencil by means of stick to the stencilafter it has been printed. It

is, therefore, usually necessary to use the rubber band 93, or someequivalent means, to effect separation of the printed sheet from thestencil.

' The" equipment which is required for thus adapting the ordinary platenpress to paint process work'is relatively simple and inexpensive.

The special form of stencil-supporting chase frame is so' designedthatit may be substituted forthe" ordinary chase frame withoutdifficulty. Furthermore the provision of a yielding connec'' tionbetween rods 17 and crank disks 19, and the use of a hinged connectionbetween brackets "75 and 76 in lieu of the ordinary connection, are

changes which may be easily made. Theentire equipment which is requiredto adapt the press to paint process work may be supplied to; thetrade'in the form'of an attachment which may be readily applied to andremoved. from the press as desired. The invention thus in effect makes asingle machine adaptable for ordinary printing work as well as forstenciling operations. I have found that the quality of designsobtainable with a press of, this type is vastly superior to the re sultsobtainable by the older hand-methods of operation. Also there is asubstantial saving in cost, inasmuch as a single operator may turn out amuch larger volume of work than could be produced by several operatorsusing a hand operated machine. I

The foregoing detailed description has been given for clearness ofunderstanding only, and no unnecessary limitations should be understandtherefrom, but the appended claims shouldbe construed as broadly aspermissible in view of the prior art. 7 I

What I regard as new and desire to secure by Letters Patent is: 1

1. In a press for printing sheet stock and the like, the combinationwith a frame, a platen pivotally supported thereon, a bed, an inkingframe supported for turning movement on the bed, means providing pivotalsupport for said bed on the frame, and means for periodically movingsaid platen and the bed about their points of pivotal support to andfrom printing-position rel ative to one another, of a stencil, astencil-supporting frame adapted to be mounted on the bed in position toregister with the platen in the closedposition of the press, a squeegeemounted in said frame for reciprocation over the stencil, meansoperatively connecting said inking frame with the squeegee, means forsupplying paint to the stencil, means for periodically arrestingmovement of the bed away from the platen, whereby to momentarilymaintain thepress in closed position, and means for turning said inkingframe to advance the squeegee over the face of the stencil while thelatter remains in contact with the sheet to be printed.

2. In a press for printing sheet stock and the like, the combinationwith a frame, a platen pivotally supported thereon, a bed, an inkingframe supported for turning movement on the bed, means providing pivotalsupport for said bed on the frame, and means forperiodically moving saidplaten and the bed about their points of pivotal support to and fromprinting position relative to one another, of a stencil, astencilsupporting frame adapted to be mounted on the bed in position toregister with the platen in the closed position of the press, a squeegeemounted in said frame for reciprocation over the stencil, meansoperatively connecting said inking frame with the squeegee, means forsupplying paint to the stencil, means for periodically arrestingmovement of the bed away from the platen, whereby to momentarilymaintain the press in closed position, and means for turning saidinkingframe to advance the squeegee over the face of the stencil whilethe latter remains in contact with the sheet to: be printed, said lastmentioned means being operative to return the squeegee to the rear edgeof the stencil after the, latter has been removed from-the printed sheetand before .it is returned to printing position relative tothe platen.

3. Ina press for printing sheet stock and the like, the combination witha frame, a platen piv.- otally supported thereon, a bed, an inkingframev supported for turning movement on the bed, means providingpivotal support for said bed on the frame, and means for periodicallymoving said platen and the bed'about their. points of pivotal supporttoand from printing position relative to one another, of a stencil,astencilsupporting frame adapted to be mounted on the bed in position toregister with the platen in the closed position of the press, a squeegeemounted in said frame for reciprocation over the stencil, meansoperatively connecting said inking frame with the squeegee, means ofsupplying paint to the stencil, means for periodically arrestingmovement of the bed away from the platen, whereby to momentarilymaintain the press in closed position, means for turning said inkingframe to advance-the squeegee over the face of the stencil while thelatter remains in contact with the sheet to be printed, said lastmentioned means being operative to return the squeegee to the rear edgeof the stencil after the latter has been removed from the printed sheetand before it is returned to printing position relative-to the platen,and means preventing contact of the stencil with the squeegee duringreturn movement of the latter to the rear edge of the stencil.

(t. In a press for printing sheet stock and the like, the combinationwith a platen, a bed, and means for periodically moving the latter toand from printingposition relative to the platen, of achase supported onthe bed, a stencil, a stencilsupporting frame movably supported on. thechase in position to register with the platen in the closed position ofthe press, a squeegee mounts ed'in the chase for reciprocation over thestencil, means for supplying paint to the stencil, means forperiodically arresting movement of the. bed away from the platen wherebyto momentarily maintain the press in closed position, means foradvancing the squeegee over theface of the stencil while the latterremains in con tact with the sheet being printed, said last-mentionedmeans being operative to return the squeegee to the rear edge of thestencil after the 1atterhas been removedfrom the printed sheet andbefore it is returned to printing position relative to the platen, andmeans operative upon movement of the bed away from the platen to movethestencil-supporting frame to pcsition preventing contact of the stencilwith the squeegee during movement of the latter through the returnstroke.

5. In a press for printing sheet stock and the 1 like, thecombinationwith a platen, a bed, and means for periodically moving thelatter to and from printing position relative to the platen, of astencil, astencilesupporting frame adapted to be mounted on the bed inposition to register with the platen in the closed position of thepress, a squeegee mounted in said frame for reciprocation over thestencil, means for supplying paint to'the stencil, means forperiodically arresting movement of the bed away from the platen, wherebyto momentarily maintain the press in closed position, means foradvancing the squeegee over the face of the stencil while the latterremains in contact with the sheet to be printed, said last mentionedmeans being operative to return the squeegee to the rear edge of thestencil after the latter has been removed from the printed sheet andbefore it is returned to printing position relative to the platen, andmeans for engaging-andholding the squeegee at the rear edge ofthestencil upon completion of the return stroke, said last-mentionedmeans being operative to release-the squeegee upon movement of the bedto printing position.

6. In a press for printing sheet stock and the like, the combinationwith a platen, a bed, and means for periodically moving the latter toand from printing position relative to the platen, of a stencil, astencil-supporting frame adapted to be mounted on the bed in position toregister with the platen in the closed position of the press, a squeegeemounted in said frame for reciprocation over the stencil, means forsupplying paint to the stencil, means for periodically arrestingmovement of the bed away from the platen, whereby to momentarilymaintain the press in closed position, means for advancing the squeegeeover the face of the stencil while the latter remains in contact withthe sheet to be printed, said last-mentioned means being operative toreturn the squeegee to the rear edge of the stencil after the latter hasbeen removed from the printed sheet and before it is returned toprinting position relative to the platen, means for engaging and holdingthe squeegee at the rear edge of the stencil upon completion of thereturn stroke, said last-mentioned means being operative to release thesqueegee upon movement of the bed to printing position, and meansoperative upon movement of the bed away from the platen to move thestencil and its supporting frame to a position preventing contact ofthe'stencil with the squeegee during movement of the latter through thereturn stroke.

7. In a press for printing sheet stock and the like, the combinationwith a bed, a platen, including a frisket frame pivotally supportedthereon, and means for periodically moving the bed and platen to andfrom printing position relative to one another, of a stencil, astencil-supporting frame adapted to be mounted on the bed in position toregister with the platen in the closed. position of the press, asqueegee mounted in said frame for reciprocation over the stencil, meansfor supplying paint to the stencil, means for periodically arrestingmovement of the bed away from the platen, whereby to momentarilymaintain the press in closed position, means for advancing the squeegeeover the face of the stencil while the latter remains in contact withthe sheet to be printed, and means extending between the arms of thefrisket frame for engaging the sheet to effect separation thereof fromthe stencil upon movement of the bed and platen to open position.

8. In a press for printing sheet stock and the like, the combinationwith a bed, a platen, including a frisket frame, and means forperiodically moving the bed and platen to and from printing positionrelative to one another, of a stencil, a stencil-supporting frameadapted to be mounted on the bed in position to register with the platenin the closed position of the press, a squeegee mounted in said framefor reciprocation over the stencil, means for supplying paint to thestencil, means for periodically arresting movement of the bed away fromthe platen, whereby to momentarily maintain the press in closedposition, means for advancing the squeegee over the face of the stencilwhile the latter remains in contact with the sheet to be printed, saidlast-mentioned means being operative to return the squeegee to the rearedge of the stencil after the latter has been removed from the printedsheet and before it is returned to printing position relative to theplaten, and latch mechanism for engaging and holding the squeegee at therear edge of the stencil upon completion of the return stroke, saidmechanism being arranged to be engaged by the frisket frame to effectrelease of the squeegee upon movement of the bed to printing positionagainst the platen.

9. In a platen press for printing sheet stock and the like, thecombination of a frame, a bed pivotally supported on the frame, drivemeans including a crank disk supported on the frame and a crank arminterposed between said disk and the bed for periodically moving thelatter to and from closed position against the platen, a stencil, astencil-supporting frame mounted on the bed in position to register withthe platen in the closed position of the press, a squeegee mounted insaid frame for reciprocation over the stencil, means for supplying paintto the stencil, means comprising a yielding connection between saidcrank disk and arm for periodically arresting movement of the bed awayfrom the platen whereby to momentarily maintain the press in closedposition, and means for advancing the squeegee over the face of thestencil while the press remains in closed position.

10. In a platen press for printing sheet stock and the like, thecombination of a frame, a bed pivotally supported on the frame, drivemeans including a crank disk supported on the frame and a crank arminterposed between said disk and the bed for periodically moving thelatter to and from closed position against the platen, a stencil, astencil-supporting frame mounted on the bed in position to register withthe platen in the closed position of the press, a squeegee mounted insaid frame for reciprocation over the stencil, means for supplying paintto the stencil, means comprising a yielding connection between saidcrank disk and arm for periodically arresting movement of the bed awayfrom the platen whereby to momentarily maintain the press in closedposition, and means for advancing the squeegee over the face of thestencil while the press remains in closed position and for returning thesqueegee to the rear edge of the stencil during the period in which thebed is away from printing position.

11. In a press for printing sheet stock and the like, the combinationwith a platen, a bed, and means for periodically moving the latter toand from printing position relative to the platen, of a stencil,stencil-supporting frame adapted to be mounted on the bed in position toregister with the platen in the closed position of the press, a squeegeemounted in said frame for reciprocation over the stencil, means forsupplying paint to the stencil, means for periodically arrestingmovement of the bed away from the platen, whereby to momentarilymaintain the press in closed position, an inking frame supported forturning movement on the bed, means operatively connecting said framewith the squeegee, a connecting member interposed between the pressframe and said inking frame for turning the latter to move the squeegeefrom the upper to the lower edge of the stencil upon movement of the bedaway from the platen, latch mechanism for engaging and holding thesqueegee at the lower edge of the stencil pending movement of the bed toclosed position, said latching mechanism being arranged to release thesqueegee upon movement of the bed to closed position and said inkingframe being over-balanced upon its point of support whereby to effectrapid upward movement of the squeegee over the face of the stencil whilethe latter remains in contact with the sheet to be printed.

HOWARD W. PARMELE.

